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United States Patent | 5,314,739 |
Teodoro Vidal | May 24, 1994 |
The security paper incorporates, as fundamental characteristic, groups of security yarns which are braided within each group, using at least three yarns so that such braiding presents a very characteristic irregular surface, easily detectable by touch, for identification of the document either by the bank staff or by blind people. The use of yarns of different colours in each braiding allows to form colour combinations which collaborate in the personalization of the yarn and, consequently of the document, for example the colours of the national flag corresponding to the country issuing the document.
Inventors: | Teodoro Vidal; Juan (Burgos, ES) |
Assignee: | Fabrica Nacional de Moneda y Timbre (Madrid, ES) |
Appl. No.: | 923994 |
Filed: | December 15, 1992 |
PCT Filed: | January 10, 1992 |
PCT NO: | PCT/ES92/00005 |
371 Date: | December 15, 1992 |
102(e) Date: | December 15, 1992 |
PCT PUB.NO.: | WO92/12293 |
PCT PUB. Date: | July 23, 1992 |
Jan 10, 1991[ES] | 9100063 |
Current U.S. Class: | 428/195.1; 428/375; 428/690; 428/915 |
Intern'l Class: | B32B 003/00 |
Field of Search: | 428/195,292,294,375,704,908,915,916,690,195,690,915 106/21,22 162/108 283/91,92 |
3880706 | Apr., 1975 | Williams | 162/103. |
4652015 | Mar., 1987 | Crane | 283/91. |
4756557 | Jul., 1988 | Kaule et al. | 283/85. |
4897300 | Jan., 1990 | Boehm | 428/195. |
5118349 | Jun., 1992 | Jalon | 106/21. |
5161829 | Nov., 1992 | Detrick et al. | 283/91. |
Foreign Patent Documents | |||
0185396 | Jun., 1986 | EP | . |
2117055 | Jul., 1972 | FR | . |
136876 | Sep., 1974 | GB | . |